PostgreSQL is an actively used query language created in 1996.

23Years Old 342,776Users 3,138Jobs

Example code from the Hello World Collection:

-- Hello World in PL/pgSQL (PostgreSQL Procedural Language)
-- In old versions replace '$$' by double qoutes

CREATE FUNCTION hello_world() RETURNS text AS $$
BEGIN
RETURN 'Hello World';
END
$$ LANGUAGE plpgsql;

SELECT hello_world();
Edit

Last updated February 11th, 2019